Mitutoyo, 331-364-30, Series 331 Digital Spline Micrometer IP65 Inch/Metric, 3-4″, 2mm Measuring Face
Features:
- IP65 protection permits use in environments exposed to cutting oil, coolant, dust, etc., for use on most shop floor environments
- Ratchet mechanism provides an audible to ensure measurement is being performed at a constant pre-set force
- SPC output function allows for quick and easy data management in real time
- Functions include Origin Set, Zero Setting, Data Hold, Function Lock, Data Output, and inch/mm conversion (on inch/metric models only)
- Alarm: Low Voltage, Counting Value Composition Error
- Carbide facing on the spindle and anvil resists wear to keep surfaces flatter with longer accuracy
- Scale is laser etched on thimble for easier reading
- Frame has a non-slip finish for better grip in shop environments
- Supplied in fitted plastic case
The digital Mitutoyo spline micrometer is ideal for measuring minor indents, slots, spline shafts and keyways on workpieces. The anvil and spindle each have reduced diameters to better measure internal features with high accuracy. A ratchet-stop mechanism provides uniform pressure on a workpiece for precise, repeatable measurements. Measurements are displayed on a coolant-proof, easy-to-read LCD display.
Technical Details
| Digital/Analog: | Digital |
| Inch-Metric: | Inch/Metric |
| Range: | 3 – 4 “ |
| Digital step: | 0,00005″/0,001 mm |
| Maximum Permissible Error J MPE: | +/-0,00015″ |
| Flatness: | 0,000012″ |
| Parallelism: | 0,00012″ |
| Display: | LCD, character height 7.5 mm |
| Measuring face: | Carbide-tipped, micro-lap finish, stepped |
| Anvil / Spindle: | Type A, D=3 mm |
| Mass: | 565 g |
| Measuring spindle: | With spindle lock, ø6,35 mm, spindle pitch 0,5 mm |
| Scale: | Thimble and sleeve satin chrome finish, ø18 mm |
| Measuring force: | 5 – 10 N |
| Power supply: | 1 battery SR-44 |
| Battery life: | Approx. 2,4 years |
| Delivered: | Including box, setting standard (from 25 mm upward), key, 1 battery |
| ABS / INC (INC ZERO): | Yes |
| Auto Power OFF after 20 min. non use: | Yes |
| Function lock: | Yes |
| HOLD: | Yes |





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